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-   -   Flywheel Surface Question (http://www.hotrodders.com/forum/flywheel-surface-question-200553.html)

Dougie 06-18-2011 01:47 PM

Flywheel Surface Question
 
Small Block Chevy 168T flywheel drilled for 10.5" clutch. I got this and an almost new clutch and pressure plate with a muncie trans I bought. Cleaned it up and gave it a quickie surface job with a straightedge (1x 2 aluminum bar ) and 150 grit paper. Very little effort to make it look beautiful. Only problem is two small areas (largest is about 1"long by 3/8" wide) on opposite sides of the wheel on the inside edge where the clutch would ride closest to the center. They don't look burned but you can see them and feel them with finger. They are deepest on the inside of each. Putting a straightedge across them in the dark I can see a very small amount of light from a flashlight, but I don't have a feeler gauge small enough to slide in and measure the depth. I tried to slide a piece of paper (.0035") and it didn't come close to going in the gap, so I'm guessing the depth of these areas to be on the order of less than .002". What do you think about running it this way with a new clutch and pressure plate (I'm not gong to re-use old ones)? This strictly a street car with a mild 327.

oldschool hero 06-18-2011 02:09 PM

If they are not cracks ,you will be OK.

Dougie 06-18-2011 03:08 PM

No cracks. It's just not "perfect", and woldn't take much to be perfect. But it's close enough that I'm afraid the guys at the machine shop would think I'm a little goofy. Thanks.

327NUT 06-18-2011 03:12 PM

Hey we're all goofy, sounds good to me...run it, just no power shifting at 6500 please.

cobalt327 06-18-2011 06:04 PM

Quote:

Originally Posted by Dougie
Small Block Chevy 168T flywheel drilled for 10.5" clutch. I got this and an almost new clutch and pressure plate with a muncie trans I bought. Cleaned it up and gave it a quickie surface job with a straightedge (1x 2 aluminum bar ) and 150 grit paper. Very little effort to make it look beautiful. Only problem is two small areas (largest is about 1"long by 3/8" wide) on opposite sides of the wheel on the inside edge where the clutch would ride closest to the center. They don't look burned but you can see them and feel them with finger. They are deepest on the inside of each. Putting a straightedge across them in the dark I can see a very small amount of light from a flashlight, but I don't have a feeler gauge small enough to slide in and measure the depth. I tried to slide a piece of paper (.0035") and it didn't come close to going in the gap, so I'm guessing the depth of these areas to be on the order of less than .002". What do you think about running it this way with a new clutch and pressure plate (I'm not gong to re-use old ones)? This strictly a street car with a mild 327.

If the flywheel is used and you are installing a new clutch and pressure plate, resurface the flywheel. It's less because of any small defect- it's because the right finish needs to be on the 'wheel in order for the clutch to hold properly.

cranky1 06-19-2011 04:01 PM

You might go here and check out the pics.... http://www.ramclutches.com/critical%..._flywheels.htm
But it might be more of an advertisement for Ram Clutches?

cobalt327 06-19-2011 05:33 PM

Quote:

Originally Posted by cranky1
You might go here and check out the pics.... http://www.ramclutches.com/critical%..._flywheels.htm
But it might be more of an advertisement for Ram Clutches?

Ad or not, it's giving what I would consider to be legit info.

NEW INTERIORS 06-19-2011 05:42 PM

Quote:

Originally Posted by cobalt327
If the flywheel is used and you are installing a new clutch and pressure plate, resurface the flywheel. It's less because of any small defect- it's because the right finish needs to be on the 'wheel in order for the clutch to hold properly.


I agree !!! :thumbup:

cranky1 06-24-2011 06:49 AM

Quote:

Originally Posted by cobalt327
Ad or not, it's giving what I would consider to be legit info.

I thought so too or I would not have posted it. :thumbup:


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